Speech2RTT is an Android (only) communications application that enables people who are deaf, hard of hearing, and late-deafened to communicate with anyone using Android smart phones.


Works over all cellular networks, worldwide;

  • Automatically transcribes speech to text, in real-time, in 68 languages;
  • Usable in 94 countries;
  • Provides communications that are 100% private. There are no communications assistants (CAs) involved.
  • No limits are imposed on the length of a communication;
  • Offers 24×7 availability with no waiting;
  • Enables users to communicate “on the go” since the service is provided on a mobile app;
  • Fast communications: less than 300 ms latency streaming from one device to another; and,
  • No voice-training is needed, even with accents;


Speech2RTT is being offered at no cost until further notice.

How Speech2RTT is different:

Speech2RTT® handles all of the following processes in real time, locally, on your Android smart phone:

  • Speech Recognition;
  • Speech Transcription;
  • Buffering Transcriptions;
  • Error Correction;
  • Streaming transcribed text, in real time, to the party you are communicating with;
  • Receiving and displaying the other party’s text messages on your smart phone, in real time;

Challenges processing everything, locally, on your smart phone;

Your smart phone may not have the power necessary to use Speech2RTT. This is because there are major differences in CPUs (power/speed), Memory Chips (capacity/speed), and storage space. For example, Android CPU ratings (across hundreds of tested Android devices) vary in processing power by a factor of 1,600% You can check the benchmark statistics for your Android smart phone using the following links. Source: https://www.androidbenchmark.net/

Ground rules for using Speech2RTT:

  • Take turns when communicating with others;
  • After every pause in your speech, pause for 1-2 seconds before commencing to speak again. This provides your smart phone with enough time to stream any text remaining in the transcription buffer. For slower smart phones: If you speak too quickly after a pause, and you buffer has not had a chance to empty, the first few words in the transcript of what you are saying when you begin speaking again, will be cut off.
  • Speak as clearly and distinctly as possible;
  • Speak at a normal pace;
  • If words are transcribed incorrectly, simply repeat them;
  • If you opt to type your messages in real time, make sure that Speech2RTT’s “Stop Listening” button is activated.
  • Turn off all other running apps on your smart phone before using Speech2RTT;
  • Do not place 911 RTT calls or any other type of calls that could you consider critical, or an emergency.
  • Do not use Speech2RTT to try and establish “TTY to RTT” or “RTT to TTY” communications.
  • Do not use Speech2RTT when other VoIP, SIP, or WiFi calling apps are running at the same time.
  • Do not use Speech2RTT when any other apps are running on your device.

Circumstances under which Speech2RTT may not work on your smart phone:

  • Your smart phone does not have the resources necessary to run Speech2RTT; or,
  • You are not following the “Ground rules for using Speech2RTT” guidelines.

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